[K1] Filter question..

[Gil G.]

Hello,

Please have a look:

http://radiopreppers.com/images/K1_FL3.png

This is my K1 on FL3. Looks similar on FL2, better on FL1.
How do I bring it to center on 600Hz?

Thanks,

Gil.
--
PGP Key: http://keskydee.com/gil.asc

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[Don Wilhelm-4]

Gil,

You adjust the RX BFO trimmer C20.  Check that RFC1 is actually 33 uHy,
it is frequently exchanged with RFC2 while is 22 uHy.  If your color
acuity is not sufficient to clearly determine the difference between the
red bands and the orange, ask a female for assistance.

I would suggest that you will do better using an audio spectrum analyzer
in a line display mode rather than a waterfall.  You can more easily
determine the center of the passband

Once you have set the center of the passband to your desired center
frequency (also set the ST P menu to agree), turn thee TEST/OPER switch
on the bottom of the RF board to TEST.  You will find a spike at your
transmit pitch.  Adjust C13 to place that spike at the same frequency as
your ST P setting.

73,
Don W3FPR

On 9/23/2012 9:43 PM, Gil G. wrote:

> Hello,
>
> Please have a look:
>
> http://radiopreppers.com/images/K1_FL3.png
>
> This is my K1 on FL3. Looks similar on FL2, better on FL1.
> How do I bring it to center on 600Hz?
>
> Thanks,
>
> Gil.
> --
> PGP Key: http://keskydee.com/gil.asc
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>

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[k6dgw]

On 9/23/2012 7:17 PM, Don Wilhelm wrote:

> If your color
> acuity is not sufficient to clearly determine the difference between the
> red bands and the orange, ask a female for assistance.

Ummm ... not always helpful.  I have no color vision, I've showed
resistors to my wife who tells me, "Well that first one is sort of
salmon-ey maybe closer to peach."  Salmon is a fish, peach is a fruit.
Colors are red, blue, green, orange, yellow, violet ... you know, like
in preschool.

73,

Fred K6DGW
- Northern California Contest Club
- CU in the 2012 Cal QSO Party 6-7 Oct 2012
- www.cqp.org


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[Don Wilhelm-4]

Fred,

That hits right at home base.  Yes, these women have lots of names for
those "in between" colors, and paint manufacturers amplify that by a
factor of 10.

My wife tells me that I only had 8 crayons in my box when I was a kid,
but that is sufficient for reading resistor values.

I have compared resistor color bands on some older carbon resistors that
I still have in my junkbox, and I can say for certainty that the colors
are not as saturated as they used to be, so it is not all my eyes (which
admittedly are not as great as they used to be).
RF Choke bands are about the same as the resistor bands.

73,
Don W3FPR

On 9/23/2012 10:49 PM, Fred Jensen wrote:

> On 9/23/2012 7:17 PM, Don Wilhelm wrote:
>
>> If your color
>> acuity is not sufficient to clearly determine the difference between the
>> red bands and the orange, ask a female for assistance.
> Ummm ... not always helpful.  I have no color vision, I've showed
> resistors to my wife who tells me, "Well that first one is sort of
> salmon-ey maybe closer to peach."  Salmon is a fish, peach is a fruit.
> Colors are red, blue, green, orange, yellow, violet ... you know, like
> in preschool.
>
> 73,
>
> Fred K6DGW
> - Northern California Contest Club
> - CU in the 2012 Cal QSO Party 6-7 Oct 2012
> - www.cqp.org
>
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>

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